All About Spelling is very helpful for hands-on learners and it does teach the rules. I’ve used it very successfully, but it does take mom involvement. We spend 15-20 minutes per day. It is, by far, the easiest OG method out there. I do highly recommend it.
Another option…There is a book, by Gayle Graham, called How to Teach Any Child to Spell and a companion workbook called Tricks of the Trade. These are aimed at bad spellers. You might have success combining Spelling Wisdom with something like this by studying for your prepared dictation and any difficult words go into the personal notebook (Tricks of the Trade) that is arranged by rules that can be very helpful (think personalized, but organized spelling notebook). You can see it here, but unfortunately no sample pages – http://rainbowresource.com/product/How+to+Teach+Any+Child+to+Spell+-+Tricks+of+the+Trade+2-Book+Set/000350/1263580985-761378
I’ve heard good things about Read, Write, Type software, but I think it is geared to a little bit younger set. See it at – http://www.talkingfingers.com
The other thing I’ve heard of recently is the Calvert Spelling program, but I’ve not seen/heard a sample. It is audio based so it wouldn’t be mom-intensive.
Personally, we use AAS w/ Spelling Wisdom, but you have to find the right fit for you.
Wishing you the best in your search.
Christie